High severity8.1NVD Advisory· Published Aug 25, 2026· Updated Aug 27, 2026
CVE-2026-66422
CVE-2026-66422
Description
Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole().
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120.
The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8- osv-coords7 versionspkg:bitnami/tomcatpkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat10&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat11&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat11&distro=openSUSE%20Tumbleweed
>= 7.0.97, < 9.0.121+ 6 more
- (no CPE)range: >= 7.0.97, < 9.0.121
- (no CPE)range: < 9.0.121-160000.1.1
- (no CPE)range: < 9.0.121-1.1
- (no CPE)range: < 10.1.59-160000.1.1
- (no CPE)range: < 10.1.59-1.1
- (no CPE)range: < 11.0.25-160000.1.1
- (no CPE)range: < 11.0.25-1.1
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2026/08/26/6nvdThird Party AdvisoryMailing List
- lists.apache.org/thread/j5plylz1b2vhqvbkqn7k58nygxhcpk73nvdVendor AdvisoryMailing List
News mentions
2- Apache Tomcat Vulnerabilities Let Attackers Bypass Security Controls and Crash ServersCyber Security News · Aug 27, 2026
- Apache: 25 Vulnerabilities Across Tomcat, Camel, Hive, and More Disclosed Aug 24-26Vypr Intelligence · Aug 26, 2026